Blender is running too slow
8 cores (4+4HT). No antivirus installed.
No process that consumes more than 1% of the CPU.
The CPU is at 1%-7% of use.
Anyway, now i think this is not Blender's failure because now Firefox ( ^^U ) is doing something like that.
I'm going to reinstall Windows today.
Thank you anyway.

(sorry for my english again)